Telegraph-sounder.



No. 644,714. Patented Mar. 6, I900. S. F. LIVELY.

TELEGRAPH SOUNDER.

(Application filed-June 6, 1899.)

(No Model.)

l 1 'll lllllllll V WITNESSES NEYS UNITED STATES FATENT @rrmri.

SAMUEL FLOYD LIVELY, OF ALDERSON, W'EST VIRGINIA.

TELEG RAPH-SOUNDEFt.

SPECIFICATION formingpart of Letters Patent Nb. 644,714, dated. Mae. c, 1906.

Application filed June 6, 1899. Serial No. 719,567. (No model.)

1'0 all whom it may concern:

Be it known that I, SAMUEL FLOYD LIVELY, of Alderson, in the county of Monroe and State of West Virginia, have invented a new and Improved Telegraph-Sounder, of which the following is a full, clear, and exactdescription.

This invention relates to improvements in telegraph double Sounders; and the object is to provide a double sounder in which the two sounds shall be alike in tone or pitch, thus rendering the sounder distinct and clear, and, further, to provide a pole-changer whereby the direction of the current-flow may be changed at will, thus enabling the operator to use the end of the lever for downward stroke that happens to be the heavier.

I will describe a telegraph-sounder embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts'in both the figures.

Figure 1 is a plan view of a sounder embodying my invention and showing the circuits in diagram, and Fig. 2 is a section on the line 2 2 of Fig 1.

Referring to the drawings, 1 designates the base of the sounder, which will be preferably connected to a table 2 or the like by means of a bolt 3, passing upward through an opening in the table-top and engaging in an interiorly-tapped thimble 4, seated in the base 1. This screw will rigidly hold the sounder from movement, and this is quite essential, because if the sounder should be slightly moved after once adjusting a change in the two sounds on the anvils might take place, and, further, the metal thimble will prevent splitting of the base by the screw.

Mounted on the base 1 are two pairs of electromagnets 5 6, and coacting with these magnets is a sounding-lever 7 ,which is equipoised, or, in other Words, it has central trunnions 8, which engage in bearings arranged in an upright yoke 9, placed on the base 1 between the electromagnets 5 6.

On the lever 7 is an armature 10, placed over the cores of the electromagnets 5. Also on this lever is an armature 11, placed over the cores of the electromagnets 6. At its opposite ends the lever 7 is provided with tappets 12 13, which are shown in the form of screws and therefore adjustable. These tappets are designed to strike upon anvils 14 15, attached to the base 1.

One pole of the electromagnets 5 is connected by wires 16 17 with one pole of the battery 18, and one pole of the electromagnets 6 is connected by the wire 19 with said pole of the battery 18. From the other pole of the electromagnets 5 wires 20 21 extend to an arm 22 of a pole-changing switch, while from the other pole of the electromagnets 6 wires 23 24 extend to a connection with the other arm 25 of the pole-changing switch. These arms 22 and 25 are connected together, so as to be moved in unison by means of a link 26, on which is a finger-piece 27. The arm 22 of the pole-changing switch is designed to be placed in contact with either one of two contactpoints 28 29, and the arm 25 is designed to be placed in contact with either one of 'the two contact-points 29 30. The contacts 28 and 30 are in electrical connection by means of a wire 31 with the back contact 32 of a relay 33, while the contact-point 29 is in electrical connection by means of the wire 34 with the front contact 35 of the relay. This front contact 35 extends from a post 36, mounted on the base of the relay. The relay-armature 37 has connection through the wire 38 with the battery 18, and it is designed to be placed in contact with the back contact 32 of the relay when said relay is energized by closing the key 39 in the main circuit. When the relay-magnet is denergized, the armature-lever will be drawn into engagement with the front contact 35 by means of a spring 40, connected at one end to the armature-lever and at the other end to the post 36, but insulated therefrom.

In operation when the circuit of the battery 18 is closed upon closing the key 39 the relay -n1agnet will be energized and draw the armature-lever 37 into electrical connection with the back contact 32. The current will then be from the battery 18 through the wire 38, armature-lever 37, the contact 32, the wire 31, the switch-arm 22, the wires 21 and 20, through the electromagnets 5, and thence back to the battery. This will cause the tappet 12 to strike upon the anvil 14. When the current is broken at the key 39, the spring 40 will cause an electrical connection between the armature-lever 37 and the front contact 35 of the relay. Then the current will be from the battery 18 through the wire 38, the armaturelever 37, the contact 35, the wire 34, the arm 25, wires 2t 23, through the eleetromagnets 6, and then back to the battery, which will cause-the tappet 13 to strike upon the anvil 15, producing a sound like the first sound.

I prefer to so adjust the tappets 12 and 13 that one armature will come nearer the core of its magnet than the other, thus producing a heavier blow, and I so arrange the connections that this heavier blow will occur during the downward stroke-that is, when the armature 37 engages the back cont-act 32.

By changing the switch-arms 22 and 25 to engage, respectively; with the contacts 29 and 30 it is obvious that by closing the circuit at the key 39 the current will first pass through the electromagnets 6 and then through the electromagnets 5. This pole-changer enables the operator to use for the downstroke the end of the lever7 that happens to come nearer to its electromagnet, thus saving time in adjustment. The downward or positive stroke is made heavier, as described, by adjusting the lever 7 by means of the tappet 12 or 13 nearer to one of the magnets. By moving the switch-arm whollyontof engagement with the contact-points it is obvious that the sounder will be out out.

In other forms of sounders havingaspring for moving one end of the sounding-lever to its sounding position the said lever begins its backward movement as soon as the circnitis broken at the operating-key; but in the construction here shown the lever does not begin its backward movement until the armature of the relay has made actual contact with the reverse contact-point of the relay. In other words, in my device all spring resistance is eliminated. Therefore there is no spring resistance to be overcome, as in other forms. Thus the mairimum soundis obtained in one cell of gravity-battery. Further, after once adjusting the device no other adjust- I ment is required. The device conformsitself to the fluctuations of the battery strength.

Having thus fully described myinvention, I claim as new and desire to secure by Letters Iatent- I 1. A telegraph-sounder, comprising a lever carrying armatures at opposite sides of its fulcrum, two sets of electromagnets for said armatures, a source of electricity one pole of which is connected with one end of the coils of each set of electromagnets, a switch comprising two parts connected to move in unison and each having a conducting connection with the other end of the coils of one set of electromagnets, a relay comprising an electromagnet, an armature connected with the other pole of the source of electricity and two contacts adapted to be engaged alternately by the armature, stationary contacts arranged to be engaged by the parts of the said switch, and conducting connections from said stationary switch-contacts to the relay-contacts. 2. A telegraph-sounder, comprising a lever carrying armatures at opposite sides of its fulcrum, two sets of electromagnets for said armatures, a source of electricity one pole of which is connected with one end of the coils of each set of eleetromagnets, a switch comprising two pivoted members insulated from each other, a link connecting said members to compel them to move in unison,aconducting connection from the respective other ends of the coils of the sets of electromagnets to i one of the switch members, three stationary contacts adapted to be engaged hysaid switch members, a relay comprising an electromagnet, an armature connected with the other pole of the source of electricity, and two contacts adapted to be engaged alternately by the armature, a conducting connection from one of the relay-eontacts to the central switchcontact, and a conducting connection from the other relay-contact to the two outer switchcontacts.

SAMUEL FLOYD LIVELY.

Witnesses:

J. W. GILLISPIE, J. G. Huonms. 

